Unformatted text preview: k o = = Â° Â° = ( )( . ) ( . ) . 1400 0 0275 0 6 64 2 W / m . C m W / m. C 2 Water 97 Â° C Egg T i = 8 Â° C The constants Î» 1 and A 1 corresponding to this Biot number are, from Table 41, 9969 . 1 and 0877 . 3 1 1 = = A Then the Fourier number becomes 2 . 198 . ) 9969 . 1 ( 97 8 97 70 2 2 1 ) 0877 . 3 ( 1 , â‰ˆ = âŽ¯â†’ âŽ¯ = âˆ’ âˆ’ âŽ¯â†’ âŽ¯ = âˆ’ âˆ’ = âˆ’ âˆ’ âˆž âˆž Ï„ Î¸ Ï„Î» e e A T T T T i sph Therefore, the oneterm approximate solution (or the transient temperature charts) is applicable. Then the time required for the temperature of the center of the egg to reach 70 Â° C is determined to be min 17.8 = = Ã— = Î± Ï„ = âˆ’ s 1068 /s) m 10 14 . ( m) 0275 . )( 198 . ( 2 6 2 2 o r t 418...
View
Full Document
 Fall '10
 Dr.DanielArenas
 Thermodynamics, Mass, Heat, Heat Transfer, 6 m, 2.75 cm, 8Â°C, 17.8 min, 64.2 k

Click to edit the document details